Clockwork Planet (クロックワーク・プラネット, Kurokkuwāku Puranetto) is a Japanese light novel series, written by Yuu Kamiya and Tsubaki Himana, and illustrated by Shino. Kodansha has published four volumes since April 2, 2013 under their Kodansha Ranobe Bunko imprint. An manga adaptation with art by Kuro has been serialized in Kodansha's shōnen manga magazine Monthly Shōnen Sirius since 2013. It has been collected in five tankōbon volumes. An anime television series adaptation by Xebec began airing in April 2017.

Everyone on the Clockwork Planet considers Naoto Miura a machinery nut. Every moment of every day, he has his mind on gears and his hands tinkering with delicate mechanical motors. But nobody understands how he can hear and feel gears in operation, even from a long distance away. Then one day, a clockwork maiden falls from the sky, presaging events that would shake the whole world.